Support for concrete-forms



' R. R. LEFFLER.

SUPPORT FOR CONCRETE FORMS.

Patented Aug. 23, 1921.

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w w 7 mm H i 7 H w WW4 UNITED STATES PATENT OFFICE.

RALPH R. LEFFLER, OF CLEVELAND, OHIO, ASSIGNOR TO THE HYDRAULIC PRESSED STEEL COMPANY, OF CLEVELAND, OHIO, A CORPORATION OF OHIO.

SUPPORT FOR CONCRETE-FORMS.

Specification of Letters Patent.

Patented Aug. 23, 1921.

To all whom it may concern:

Be it known that I, RALPH R. LEFFLER, a citizen of the United States, residing at Cleveland in the county of Cuyahoga and State of Ohio, have invented a certaln new and useful Improvement in Supports for Concrete-Forms,of which the following is a full, clear, and exact description, reference being had to the accompanying drawings.

This invention relates generally to concrete forms and more particularly to the improved means for supporting the same, the object being to provide a simple and easily operated supporting device by means of which the form can be held in its proper position duringthe preliminary settling and hardening of the cement and easily removed without removing the main supports.

With these objects in view the invention consists in the novel features of construction and in the manner of combinin or arranging them, all of which will be fu ly described hereinafter and set forth in the appended claims."

In the drawings forming a part of this specification, Figure 1 is a sectional perspective view illustrating one embodiment of my invention; Fig. 2 is an elevation partly in section illustrating the adjustability of the supporting arms; Fig. 3 is a detail erspective view of the supporting arm and ig. 4 is a detail perspective view of the stirrup to which said arm is attached. 1

In carryin out the invention I employ sheet metal orms A, which may be arched as shown or flat if preferred. The side edges of these pans are formed with horizontal flanges A and depending vertical flanges A,

and the forms are arranged in pairs in parallel order as shown; and resting upon the flanges A. is a filler plate B carried by a wooden strip C, said wooden stri resting upon the upper edge of a joist D w ich may be supported in any suitable manner.

Sheet metal stirru s E are arranged upon the joist D at suitab e intervals said stirrups carrying the supporting arms F, one at each side thereof, and which in turn are brought into supporting engagement with the edges of the forms. When the supporting arms are elevated and fastened they are in engagement with and support the forms or pans, and when lowered they are clear of the edges of the forms or pans and consequently said forms or ans can be removed.

Each le 0 the stirrup E has inverted key-hole s ots E and E cut therein, and each leg also has a square opening E cut therein adjacent the lower end thereof. The stirrup E as before statedis placed at suitable intervals along the joist D and is rigidly connected thereto by nails or bolts G which pass through the lower ends of the stirrups into the said stringers, spacing blocks G being interposed between said ends and the joist in order to space the legs of the stirrup away from the sides of the joist to permit the movements of the parts of the su porting arm and locking lever.

he supporting arm F is made of sheet metal, bent centrally to provide two parallel members essentially triangular in shape and the inner edges of said members are formed at one point into a head F which is adapted to be inserted into the opening E in the stirrup, and between the lower ends of the parallel members there is pivoted a lockin lever H having a hooked end H whic 1 is adapted to enter the opening E and in some instances the o ening E as will be more fully explained ereinafter.

A depending latch I is pivoted at I between the members of the supporting arm'at their upper outer ends, said latch having an opening I in the lower end thereof which is adapted to receive and engage the outer end of a locking lever H. The upper end of the latch is turned over the pivotal connection and is somewhat enlarged as shown at I in order to prevent dislocation.

The upper end of the supporting arm is shouldered as shown at F, and is also providedwith parallel slots F When the supporting arm is used in connection with the form or pan herein shown, the edge of said pan rests u on the supporting arm and the epending ange A rests against the shouldered end F but in. case a wider filling strip is employed, and the edges of the pans spaced farther apart, then the depending flange A would engage one or the other of the slots F. In order to bring the supporting arm into operation, the head F is inserted in the opening E and the shank thereof moved up into the narrow portion of said opening thereby lifting the supporting arm to its highest position, and at which oint it serves as a support for thepan or orm. The'hooked end H of the locking lever is then brought into engagement with the stirrup throu h the opening E and the latch I is turned own into engagement with the outer end of the locking lever and the supporting arm will then be securely locked into roper elevated position.

When it is desired to remove the form A,

so that said form can be used again, the latch I is swung outwardly as shown in dotted lines at the right of Fig. 2 and the look ing lever H will drop and the supporting arm F can then be moved down and removed, thereby clearing way for the quick and easy removal of the pan or form without disturbing the wooden supporting members. In case a fiat slab pan is employed the head F of the locking arm will be inserted in the ke -hole opening E and the locking lever wil be brought into engagement with the stirrup through the opening E When the arm is connected to the stirru in this manner the upper end thereof Wlll be in substantial alinement with the upper member of the stirrup.

By means of a support constructed as herein shown and described, arched pans or forms can be arranged to provide varying widths of beam structures, and the supports besides providing this variability for beam structures, can also be used in connection with flat slab pans for forming flat ceiling structures.

The stirrup is permanently connected to the joist and the locking lever and latch are permanently connected to the supporting arm and consequently the chance of accidental misplacement of any parts is reduced to a minimum.

The supporting arm can be quickly and easily attached to the stirrup and locked in its elevated position and can also be quickly and easily unlocked and removed when it is desired to remove the pan or form. All of the parts being made of pressed sheet metal materially reduce the cost of production.

Having thus described my invention, what I claim is 1. The combination with a form, of means for supporting said form including a stirrup, a supporting arm adjustable upon said stirrup to either an operative or an inoperative position, together with means for locking said arm in its operative position.

2. The combination with a form, of a stirrup adapted to straddle a stringer, supporting arms adjustable vertically upon said stirrup, locking'means carried by said arm and adapted to engage said stirrup.

3. In a device of the kind described, the combination of a stirrup, of supporting arms detachably connected therewith, a looking lever carried by said arms and adapted -to engage a stirrup and means carried by said arms for holding said locking levers in enga ement with said stirrup.

4. n a device of the kind described, the combination with a stirrup havin a plurality of openings in the legs thereo a looking arm having a plurality of slotsin the top thereof and provided with means for engaging the openings in said stirrup, a locking lever carried by each of said arms and a latch carried also by each of said arms ilnd adapted to engage its respective locking ever.

5. In a device of the kind described, the combination with an apertured member of a supporting arm adapted for detachable connection with said slotted member, a locking lever carried by said supporting arm and a latch also carried by said supporting arm, said locking lever being adapted to engage the apertured member and the latch adapted to engage the locking lever.

In testimony whereof I hereunto aflix my signature.

RALPH R. LEFFLER. 

